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2. 发明公开

EP0317702A1 Staged pressure relief assembly 失效
标题翻译： Stufenweise Druckentlastungsanordnung。
公开(公告)号：EP0317702A1
公开(公告)日：1989-05-31
申请号：EP88109519.4
申请日：1988-06-15
申请人： Fike Corporation
发明人： Swift, Ian , Degood, Robert L.
IPC分类号： F16K17/40
CPC分类号： F16K17/162 , Y10T137/0396 , Y10T137/1707 , Y10T137/1729 , Y10T137/1744
摘要： A pressure relief panel assembly (20) for rupture discs, explosion vents and the like has a plurality of frangible panel portions (140, 44, 50) which burst at different pressures to present a pressure relieving aperture having a cross-sectional area which varies in accordance with the number of panel portions (40, 44, 50) which have ruptured. In one embodiment of the invention, the assembly comprises two frangible panels (26, 30) positioned in face-to-face relationship in covering disposition to a vent opening, and the innermost panel has an orifice which functions as a pressure relieving aperture once the outermost panel ruptures; subsequently, further build up of pressure causes the innermost panel to burst and present a pressure relieving aperture larger than the orifice so that the structure to be protected is fully vented. In certain forms of the invention, a discontinuous pattern of perforated lines of weakness in the innermost panel serve as pressure relieving apertures once the outermost panel ruptures. In another embodiment, the assembly comprises a single panel (125) having one set of weakness lines (142) defining a first frangible panel portion (140) and a second set of weakness lines (142) surrounding the first set and defining a second frangible panel portion (144).
摘要翻译：用于破裂盘，爆炸孔等的压力释放面板组件（20）具有多个易碎的板部分（140,44,50），其在不同的压力下爆裂，以呈现具有变化的横截面积的减压孔根据已经破裂的面板部分（40,44,50）的数量。在本发明的一个实施例中，组件包括以面对面关系定位的两个易碎面板（26,30），以覆盖布置到排气口，并且最内面板具有一个孔口，其作为减压孔，一旦最外面板破裂; 随后，压力的进一步增加会导致最内面板爆裂并提供比孔更大的减压孔，使得要被保护的结构被完全排气。在本发明的某些形式中，一旦最外面的面板破裂，最内面板中的穿孔线的不连续图案用作减压孔。在另一个实施例中，组件包括具有限定第一易碎面板部分（140）的一组弱线（142）和围绕第一组的第二组弱线（142）的单个面板（125），并且限定第二易碎片面板部分（144）。

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